Apparatus for routing recesses in doors and the like

ABSTRACT

An apparatus for accurately and concurrently routing recesses in both doors and associated door jambs to receive hinges of different sizes. The apparatus automatically follows a templet device which can be readily adjusted to form recesses for different size hinges.

O v Umted States Patent 1 1 0, Frydenberg 51 May I; 1973 APPARATUS FORROUTING RECESSES [56] References Cited IN DOORS AND THE LIKE UNITEDSTATES PATENTS [75] Inventor: Donald V. Frydenberg, Arlington, o

2,734,428 2/1956 Onsrud ..90/l 5 2,629,937 3/1953 Tubbs ....l44/27Assigneer Clary Corporation, San Gabriel, 3,297,065 1/1967 Zenner.......144 27 Calif- 3,495,636 2/1970 Smith ..144/i44 R [22] Filed: May 3,1971 Primary ExaminerDonald R. Schran [21] Appl' l39730 Attorney--FredN. Schwend [52] U.S. Cl. ..l44/27, 144/144 R, 90/13 R, [57] ABSTRACT 9062 R [51] Int Cl 5 /02 An apparatus for accurately and concurrentlyrouting [58] mid o'f's r'a;11111:1131jiiiijjizzmza R 144.6 oo oooh oooooooo oooo jooooo o receive hinges of different sizes. The apparatusautomatically follows a templet device which can be readily adjusted toform recesses for different size hinges.

9 Claims, 10 Drawing Figures Patented May 1, 1973 5 Sheets-Sheet 1INVENTOR. 00/VALD l/. fQYOf/VBEQG BYX/Z ATTO/Q/VfY.

Patented May 1, 19.73

5 Sheets-Sheet 2 Patented May 1, 1973 5 Sheets-Sheet I5 Patented May 1,1973 5 Sheets-Sheet 4 Patented May I, 1973 3,730,236

5 Sheets-Sheet 5 APPARATUS FOR ROUTING RECESSES IN DOORS AND THE LIKEBACKGROUND OF THE INVENTION 1. Field of Invention This invention relatesto an apparatus for automatically recessing doors and cooperating doorjambs to receive hinges.

2. Description of Prior Art Apparatus of the above type have beenproposed and used heretofore wherein one or more routers are locatedover one edge of a door and are manually moved in a path confined by asuitable guide templet to form one or more hinge recesses. By replacingthe templet with another having a different size or shape guide surface,recesses for different size or shape hinges may be formed.

Other apparatus have been proposed in which the hinge recess routers aremoved automatically to route hinge recesses. Such apparatus generallyinclude replaceable cams or variable throw devices which areinterchanged or adjusted to the particular intended size of each set ofhinges to be used. Although such apparatus are generally satisfactorythey are relatively expensive. Also, they require considerable down timein order to replace the cams or to adjust the parts to change the pathsof the routers in accordance with different size hinges to be used.

-justment of the apparatus to cut different sizes and shapesof hingerecesses.

SUMMARY OF THE INVENTION A principle object of the present invention isto pro vide an improved apparatus for automatically. routing hingerecesses in doors and associated door jambs.

Another object is to provide an improved automatic templet followingdevice.

Another object is to provide an apparatus of the above type capable ofquick and readyadjustment to route hinge recesses of different sizes andshapes.

Another object is to concurrently route the hinge recesses for a doorand associated door jamb.

Another object is to provide an apparatus of the above type in which arelatively unskilled workman can control to cut hinge recesses for doorsand door jambs with a high degree of accuracy.

The invention comprises a templet follower operatively connected to oneor more hinge recess routers. Guide means is provided to guide therouters in different directions and drive means yieldably drives suchguide means to cause its follower to follow a pair of templets havingcoordinate guide surfaces arranged to cause the routers to route hingerecesses of the desired size and shape. By adjusting the templets todifferent relative positions whereby to place different guide surfacesin cooperative relation to the follower, the follower is caused to movein different paths, causing the routers to cut recesses of differentsizes and shapes.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a front view, partly in section,illustrating the upper portion of a door and door jamb hinge recessingmachine, embodying a preferred form of the present invention.

FIG. 2 is an enlarged transverse sectional view taken substantiallyalong the line 2-2 of FIG. 1.

FIG. 3 is a front sectional view "illustrating part of the lower portionof the machine and is taken substantially along the line 3-3 of FIG. 4.

FIG. 4 is a sectional plan view taken along the line 4--4 of FIG. 3.

FIG. 5 is a front view, with parts broken away, of part of the lowerportion of the machine.

FIG. 6 is an enlarged fragmentary view illustrating different size hingerecesses formed in a door and its associated door jamb.

FIG. 7 is a sectional view taken along line.7-7 of FIG. 6.

FIG. 8 is a front view of the vertical templet.

FIG. 9 is a front view of the horizontal templet.

FIG. 10 is a schematic diagram of the motor controls.

DESCRIPTION OF THE PREFERRED EMBODIMENT Generally, a door and itsassociated door jamb are similarly recessed to receive the oppositewings of several hinges, such recesses being formed to a depth equal tothe thickness of the hinge wings. FIGS. 6 and 7 illustrate part of adoor 11 and associated door jamb 12 with hinge recesses 13 and 14,respectively, cut therein.

In forming the hinge recesses in accordance with the present invention,the door and door jamb are held in spaced apart relation as shown inFIG. 6. A rotating cutter diagrammatically indicated at 15 is initiallylocated between door and door jamb and is caused to follow along aclosed rectangular loop path, i.e. a, the cutter being of such adiameter as to cut the recesses in one complete circuit of the path. Inthe case of a door of greater thickness, as indicated at 11a, hinges ofa larger size are preferably employed, requiring larger recesses such asindicated by the lines 115 to be routed. Templets having guide surfacesthereon, are provided to guide the cutter. By adjusting the templets todifferent relative positions whereby to place different guide surfacesin cooperative relation to the follower, the follower is caused to movein different paths, causing the cutter to cut recesses of differentsizes and for forming the above noted hinge recesses comprises a pair ofspaced-vertical columns 17 and 18 which form part of the machine frame.Included in the frame work are a pair of spaced horizontal tubular tablemembers 20 and 21 extending the length of the machine and effective tosupport a door blank 11 thereon. The door blank is fed endwise intoproper position against a suitable stop 19 by a pair of endless conveyorbelts 22 and 23 which normally support the door blank slightly above theupper surfaces of the members 20 and 21 in a position not shown. Forthis purpose, the conveyor belts ride over guides 24 held in elevatedpositions by compression springs 25 mounted. in channel members 129attached to the members 20 and 21. when a door blank reaches its properposition, suitable clamping means including pneumatic cylinders, one ofwhich is shown at 29, force the door blank down against the uppersurfaces of the members 20 and 21.

Other clamping means, not shown, move the member 20 and a back support26 attached thereto toward the member 21 and spaced upright posts 27 tohold the door blank edgewise and to insure that the righthand edge ofthe door blank rests directly against the posts 27.

Means are provided to hold the door jamb 12, with a stop strip 28attached thereto, against the same sides of the posts 27 as the doorblank 11 is held. Initially, be fore the clamping operation, the doorjamb is inserted between the posts 27 and leaf springs 30 supported byplate members 31 which are held in spaced relation to the posts 27 byspacers 132. The stop strip 28 is caused to rest on the tops of theposts, thereby spacing the door jamb in relation to the door blank asshown in FIG. 6. The door jamb is also located against a suitable endstop 119.

Subsequently, during the clamping operation, the door jamb is clamped tothe sides of the posts 27 by clamping devices 32. Such devices eachcomprises a wedge disc 33 pivotally supported at 34 and rocked clockwiseabout such pivotal support by air cylinder 35.

Three rotary cutters are provided as shown in FIG. 1 and are spacedapart distances equal to the desired spacing of the hinges. Such cuttersare driven by router motors 37 mounted on respective crossbeams 38, FIG.2, which in turn, are mounted on a channel shaped crosshead or carriers40 extending substantially the length of the machine.

The cutters 15 are adjustable relative to each other to change thespacing between the hinge recesses and for this purpose each crossbeam38 has a pair of spaced posts 41 thereon terminating in T-slot's 42.Clamps screws 43 extend through the cross head 40, through inwardlyturned ends of the posts 41, and threadably engage nuts 44 fitted withinthe slots 42. By releasing the clamp screws 43 the cross beams 38 andconsequently the cutters 15 may be adjusted lengthwise of the crosshead. Also, one or more cutters may be readily removed by releasing theclamp screws in the event, for example, it is desired to use only twohinges per door.

The cutters 15 are located such that their lefthand cutting edges, asviewed in FIG. 2, are spaced from the lefthand edges of the posts 27 byamounts equal to the thickness of the wings of the hinges to be used andthe cross head 40 is thereafter moved in a vertical plane, in accordancewith the present invention, by a templet follower to be described laterso as to cut the hinge recesses 13 and 14.

In order to guide the cross head through a parallel motion, slidebearing devices generally indicated at 46 and 47 are provided in thecolumns 17 and 18, respectively. Such devices each comprises a bearingblock 48 slideably mounted for vertical movement on a vertical post 50supported at its ends by brackets 51 mounted in the respective column,i.e. 18. The bearing block 48 has horizontal bearings formed therein toslideably receive a pair of rods 52 extending from and attached to therespective end of the cross head 40.

Describing now the templet follower for moving the crosshead 40 andcutters 15 in a vertical plane, the follower is shown particularly inFIGS. 3, 4, and 5 and comprises a pair of vertical rods 53 secured attheir upper ends to the cross head 40 and at their lower ends to endflanges 54 and 55 of a channel member 56.

A bearing block 57 is slideably mounted for relative vertical movementon the rods 53 and is urged towards its central illustrated positionrelative to the channel member 56 by two pairs of compression springs 58and 59 surrounding the rods and interposed between the bearing block andend flanges 54 and 55. The bearing block 57 has horizontal bearingswhich slideably receive a pair of horizontal rods 60 which are securedto the end flanges 61 and 62 of a second channel member 63. The bearingblock 57 is urged toward a central position, not shown, relative to theflanges 61 and 62 by pairs of compression springs 64 and 65 whichsurround rods 60 and are interposed between the bearing block andrespective ones of the end flanges.

The channel member 63 is guided for parallel bodily movement indifferent directions in a vertical plane by bearing members 66 and 67slideably mounted on vertical rods 68 secured at their top and bottomends to frame members 170 and 171. The bearing members 66 and 67 havehorizontal bearings which slideably receive the horizontal rods 60.

Drive means is provided for bodily moving the channel member 63 in acircular orbit and for this purpose a motor 70 and a suitable speedreducing unit 71 is provided, the latter being effective to rotate acrank disc 72 about an output shaft 73. The crank disc is pivotallyconnected at 74 to the channel member 63 to move the latter in acircular orbit but both it and rods 60 will be held horizontallydisposed by the slide members 66 and 67. Such orbital movement isyieldably transferred through the springs 64 and 65, bearing block 57and springs 58 and 59 to the channel member 56 which is constrained tofollow guide surfaces formed in pair of templet members 75 and 76through a roller 77 rotatably mounted on the channel member 56 and tothus transfer this controlled movement to the cross head 40. Thevertical templet member 75, FIGS. 4,5, and 8, has an opening thereindefined partly by spaced vertical sets of guide surfaces 78 and 80. Suchtemplet member is slideably mounted for vertical movement in guide ways81 and 82 suitably secured to frame members 83 and 84, respectively.Templet member 75 is connected at 85 to the piston rod of an aircylinder 86 attached at 89 to frame member 170 whereby the templetmember may be moved from its illustrated lower position shown in FIG. 5,wherein the guide surfaces 78 thereof are engageable by the roller 77,to an upper position, not shown, wherein the guide surfaces 80 thereofare engageable by the roller 77.

The templet member 76 also has an opening therein defined partly bythree sets of parallel horizontally extending guide surfaces 87, 88, and90. Templet member 76 is slideably mounted for horizontal movement inguideways 91 and 92 secured to frame members 93 and 94, respectively.Templet member 76 is connected at 95 to the piston of an air cylinder96, FIG.

4, which is, in turn, attached to the end of a second air cylinder 97whose piston rod is attached at 98 to frame member 100. Accordingly,when the pistons of both 76 is held in its position illustrated in FIGS.4 and 5' wherein the guide surfaces 87 are effective to guide the roller77, and therefore the cross head 40, horizontally.

When the piston of cylinder 96 is extended, the templet member 76 willbe moved to an intermediate position wherein the guide surfaces 88 willbe effective to guide the roller 77 horizontally. When the pistons ofboth cylinders 96 and 97 are extended, the templet member 76 will bemoved to its extreme lefthand position where the guide surfaces 90 willbe effective to guide the roller 77 horizontally.

Suitable valve means not shown are provided to selectively control theair cylinders 86, 96, and 97 to set the templet members 75 and 76 indifferent combinations of positions as will appear presently.

Normally, wooden doors are manufactured in two different thicknesses,one being 1 inches thick, as illustrated at 11 in FIGS. 6 and 7 and theother being 1 Y4 inches thick, as illustrated at 11a. Although the samesize door jamb is generally employed, the stop strip 28 is generally solocated thereon that the dimension a will be the same as the thicknessof the door.

In order to support the door jamb in the machine with the lower edge 12athereof at the same height above the upper surface of the door blank 11when routing the hinge recesses for doors of the above noted differentthicknesses, the posts 27 may be moved verti cally between their fullline positions shown in FIG. 2 and their dotted line positions 27a. Forthis purpose, the posts are guided for vertical movement in suitableslide bearings, not shown, and are attached to the piston rods of aircylinders 120 suitably attached to the machine frame work. By extendingthe cylinders 120 the postsmay be moved to their upper positions 27a.

In operating the machine, the various clamping devices are actuated indesired sequence. Suitable well known control valve and sequencingmechanisms, such as that disclosed in the US. Pat. No. 3,331,410 to 6.0.Mayo, may be employed.

Different ones of the cylinders 86, 96, and 97 are selectively actuatedto appropriately position the templet members 75 and 76 in accordancewith the size of the hinges to be used. Thereafter, the motor 70 isenergized to complete one cycle of the templet follower device, i.e. onerevolution of the crank disc 72. For this purpose, the circuit of motor70, FIG. 10, is connected in series with a normally open switch 101across a source of electric power 103. A normally open push buttonswitch 102 is connected in parallel with the switch 101. Upon closingthe switch 102 the motor operation is initiated to rotate the disc 72whereupon a camming formation 104 in the disc closes the switch 101,maintaining the motor energized until the disc 72 has made one completerevolution.

In routing the hinge recesses for thicker doors, i.e. 113, using acutter 15 of the diameter illustrated, the cutter, in following theclosed path b, leaves uncut strips 122 and 123 on the door jamb anddoor, respectively. In this case, after one cycle of the machine thecylinders 96 and 97 are extended to locate the guide surfaces 90 of thetemplet member 76 in controlling relation to the roller 77 and a secondcycle of the templet follower device is initiated. In this case, theroller will be constrained to follow a new path c wherein the cutter 15will traverse the strips 122 and In order to route hinge recesses ofsizes or shapes other than those disclosed, templet members havingappropriately shaped guide surfaces may be readily substituted for thetemplet member and 76. Such guide surfaces may be curvedv or otherwiseshaped depending upon the size and shape of the hinges to be used. Also,the radius r of the recesses may be changed as desired by substituting acutter of appropriate diameter for the cutter 15. The sizes of therecesses may also be varied by substituting rollers ofdifferentdiameters for the roller 77.

Obviously, the machine, with necessary modifications, may be used to cutrecesses or openings in other items.

I claim:

1. In a woodworking machine, the combination comprising means forsupporting a workpiece,

a cutter for said workpiece,

templet means comprising guide surfaces forming an enclosed opening;

a follower movable along said guide surfaces,

a carrier for said cutter operatively connected to said follower forbodily moving said cutter,

drive means movable in an invariable orbital path,

spring means intermediate said. drive means and said carrier urging saidcarrier toward a predetermined position relative to said drive meanswhereby to maintain said follower in engagement with said guide surfacesduring movement of said drive means in said orbital path, and

' means for maintaining said carrier in parallel positions through-outsaid movement thereof.

2. The combination according to claim 1 wherein said drive means movesin a complete circular path and said opening forms a non-circular guidesurface.

3. The combination according to claim 1 wherein said templet meanscomprises a pair of templets each having opposed guide surfaces, theguide surfaces of one of said templets complementing the guide surfacesof the other of said templets to form said opening,

means for setting said templets orthogonally relative to each other tochange the shape of said opening.

4. The combination according to claim 3 wherein said opposed guidesurfaces of each of said templets are spaced apart different amounts indifferent locations along the length thereof.

5. In a woodworking machine, the combination comprising means forsupporting a workpiece,

a cutter for said workpiece,

templet means having guide surfaces thereon, follower means movablealong said guide surfaces, a carrier for said cutter operativelyconnected to said followed means for bodily moving said cutter,

a first guide means for guiding said carrier in a first direction,

a second guide means for guiding said first guide means in a seconddirection orthogonal to said first direction,

drive means for bodily moving said second guide means in an orbitalpath, and

spring means intermediate said first and second guide means andintermediate said first guide means and said carrier urging said carriertoward a predetermined position relative to said drive means whereby tomaintain said follower means in engagement with said guide surfacesduring movement of said drive means in said orbital path.

6. The combination according to claim wherein said spring meanscomprises a first spring stressed between said carrier and said firstguide means and a second spring stressed between said first guide meansand said second guide means.

7. The combination according to claim 3 wherein one of said templetscomprises a pair of spaced parallel ones of said guide surfaces and theother of said templets comprises a second pair of spaced parallel onesof said guide surfaces,

said second pair being orthogonal to said first pair.

8. The combination according to claim 7 wherein said one templetcomprises two sets of pairs of spaced parallel guide surfaces and meansfor selectively setting said last mentioned templet to locate either ofsaid sets of guide surfaces in co-operative relation to said follower.

9. In a woodworking machine,

the combination comprising means for supporting a workpiece,

a rotatable cutter for said work piece,

templet means forming an opening comprising a guide surface;

a first carriage supporting said cutter for bodily movement,

a follower carried by said first carriage and moveable along said guidesurface,

a second carriage supporting said first carriage for movement in a firstpath,

a third carriage supporting said second carriage for movement in asecond path orthogonal to said first path,

means for bodily moving said third carriage in an or-' bital path, andyieldable means intermediate said first and second carriages andintermediate said second and third carriages for causing said followerto follow said guide surface during movement of said third carriage insaid orbital path.

1. In a woodworking machine, the combination comprising means forsupporting a workpiece, a cutter for said workpiece, templet meanscomprising guide surfaces forming an enclosed opening; a followermovable along said guide surfaces, a carrier for said cutter operativelyconnected to said follower for bodily moving said cutter, drive meansmovable in an invariable orbital path, spring means intermediate saiddrive means and said carrier urging said carrier toward a predeterminedposition relative to said drive means whereby to maintain said followerin engagement with said guide surfaces during movement of said drivemeans in said orbital path, and means for maintaining said carrier inparallel positions through-out said movement thereof.
 2. The combinationaccording to claim 1 wherein said drive means moves in a completecircular path and said opening forms a non-circular guide surface. 3.The combination according to claim 1 wherein said templet meanscomprises a pair of templets each having opposed guide surfaces, theguide surfaces of one of said templets complementing the guide surfacesof the other of said templets to form said opening, means for settingsaid templets orthogonally relative to each other to change the shape ofsaid opening.
 4. The combination according to claim 3 wherein saidopposed guide surfaces of each of said templets are spaced apartdifferent amounts in different locations along the length thereof.
 5. Ina woodworking machine, the combination comprising means for supporting aworkpiece, a cutter for said workpiece, templet means having guidesurfaces thereon, follower means movable along said guide surfaces, acarrier for said cutter operatively connected to said followed means forbodily moving said cutter, a first guide means for guiding said carrierin a first direction, a second guide means for guiding said first guidemeans in a second direction orthogonal to said first direction, drivemeans for bodily moving said second guide means in an orbital path, andspring means intermediate said first and second guide means andintermediate said first guide means and said carrier urging said carriertoward a predetermined position relative to said drive means whereby tomaintain said follower Means in engagement with said guide surfacesduring movement of said drive means in said orbital path.
 6. Thecombination according to claim 5 wherein said spring means comprises afirst spring stressed between said carrier and said first guide meansand a second spring stressed between said first guide means and saidsecond guide means.
 7. The combination according to claim 3 wherein oneof said templets comprises a pair of spaced parallel ones of said guidesurfaces and the other of said templets comprises a second pair ofspaced parallel ones of said guide surfaces, said second pair beingorthogonal to said first pair.
 8. The combination according to claim 7wherein said one templet comprises two sets of pairs of spaced parallelguide surfaces and means for selectively setting said last mentionedtemplet to locate either of said sets of guide surfaces in co-operativerelation to said follower.
 9. In a woodworking machine, the combinationcomprising means for supporting a workpiece, a rotatable cutter for saidwork piece, templet means forming an opening comprising a guide surface;a first carriage supporting said cutter for bodily movement, a followercarried by said first carriage and moveable along said guide surface, asecond carriage supporting said first carriage for movement in a firstpath, a third carriage supporting said second carriage for movement in asecond path orthogonal to said first path, means for bodily moving saidthird carriage in an orbital path, and yieldable means intermediate saidfirst and second carriages and intermediate said second and thirdcarriages for causing said follower to follow said guide surface duringmovement of said third carriage in said orbital path.